Spinning-head for forming filaments of viscose or similar material.



No. 823,009. v PATENTED JUNE 12, 1906.

I I M. WA-DDELL. SPINNING HEAD FOR FORMING FILAMENTS 0F VISGOSE 0RSIMILAR MATERIAL. APPLICATION FILED JAN. 27. 1906.

2 SH EETSSHEET 1.

I TTOBNEV.

No.4823,009. f- Y 'PATENTED JUNE 12, 1906. M. WADDELL. N

SPINNING HEAD FOR FORMING FILAMENTS OF IVISGOSE 0 SIMILAR MATERIAL.

gum/M 01 I Jlozziganzecy mall {W irnn STATES MONTGOMERY PATENT OFFICE.

'ADDELL. OF XElV YORK, X. Y., ASSIGNOR TO SILAS 1V. PETTlT, OFPHILADELPHIA, PEXXSYLVAXIA.

Specification of Letters Patent.

Patented June 12, 1906.

Application filed January 27, 1906. Serial No. 298.115.

To all whom, it may concern.-

Be it known that I. MoXTooMERY WAD- DELL, a subject of the King of GreatBritain, and a resident of Xew York, county and State of New York, haveinvented certain new and useful Improvements in Spinning- Heads forForming Filaments of Viscose or Similar Material, of which the followingis a full, clear, and exact description.

My invention relates to the construction of spinning-heads which areused for forming filaments of metamorphosed cellulose or similarmaterial in which viscose or a similar viscous material is forced underpressure through one or more openings in a perforated spinneret into acoagulating bath, the action of the bath being to change or transformthe viscous filaments into a solid filament of artificial silk orsimilar material.

The viscose which is employed in this process is a very unstablecompound, being coagulated by many substances, including almost all ofthe metals, and it follows that the metal of the pipes and of thespinning-head, through which it is conducted from the source of supplyto the spinneret, thus act upon their contact therewith to form smallclots or particles ofjelly-like impurities, which clog or close theapertures in the spinneret and interfere with the flow of the viscosetherethrough.

One of the objects of my invention is to prevent the passage to thespinneret of any impurities which may be of a size to clog or close theapertures therein.

A further object of my invention is to provide a construction in whichthe various parts may be easily removed for any purpose, as for cleaningthe same or for substituting therefor different parts adapted for theproduction of different kinds or sizes of filaments.

A further object of my invention is to make a spinneret and a strainerof a she e to with stand the high pressure to whic they are subjected inthe spinning-head Without becoming unduly distorted.

A further object of my invention is to provide a spinning-head withmeans for arresting the passage of these impurities, said means being ofsuch a material and being so located with respect to the spinneret thatno coagulation or forming of impurities will take j place between thesaid means and the spinnere-t.

l Further objects will appear in the descrip- 1 tion of the inventionand of the operation thereof, as further set out in the accompany- 1 ingspecification.

I In the drawings forming a part of this i specification, Figure 1 is alongitudinal section of my improved spinning-head. Fig. 2 f is atransverse section thereof through the spinneret, taken on the line 2 2of Fig. 1. Fig. 3 is a sectional view of a modified form of myinvention, and Fig. 4 is an end view of Fig. 3. Fig. 5 is a sectionalview of a further modification, and Fig. 6 is an end view thereof.

Referring first to the construction illustrated in Figs. 1 and 2, 1indicates a tube or pipe-to the end of which is secured by any suitablemeansas, for instance, by screwthreads 2a head 3. the face of which isprovided with a seat 1 for the gasket 5. To the head 3 is secured by anysuitable means. as by screw-threads 6, a coupling 7, provided with aninwardly-extending flange S, the inner side of which forms a seat 9 andthe outside of which is provided with a knurled portion 10, by which thesame may be readily adjusted and secured on the head 3.

11 indicates the spinneret, through which the viscose or similarmaterial is injected into the coagulating-bath, and is'formed.preferably, in the shape of a cap consistin of a cylindrical bodyportion 12, one end of which is provided with a flange 13 and the otherend of which is substantially closed by the face 14. The face 14 is,however, provided with one or more perforations or apertures 15, throughwhich the viscose or similar'material emerges from the spinning-head.

16 indicates a strainer which is similar in shape to the spinneret andconsists of a cylindrical bod portion 17, one end of which is providedwith flanges 18 and the other end of which is substantially closed bythe face 19. The face 19 is provided with a large number of perforationsor apertures 20, smaller in size than the perforations in the spinneret.This strainer is adapted to prevent those impuri- I ties which would notpass through the perforations 15 in the spinneret from being carriedinthe viscose beyond the strainer 16.

The flange 13 of the spinneret 11 rests against the seat 9 of thecoupling 7, and the body portion 12 of the spinneret is of a size toloosely fit the ening in the front of the said coupling 7. T 1e flange18 of the strainer 16 is seated on the gasket 5, and the body portion isof a size to loosely fit within said gasket and within the chamberformed in the head by the raised seat 4. Between the flanges 9 and 18 isa gasket 21.

From the above it will'be readily understood that when the coupling 7 issecured to the head 3 with the flanges of the spinneret and of thestrainer tightly clamped between the seats 4 and 9, carried by the head3, and the coupling 7, with the gaskets 21 and 5 between said flangesand between the seat 4 and flange 18, respectively, and the viscose isforced through the supply-pipe 1, any impurities larger than theapertures in the strainer 16 will be sto ped by the strainer, andconsequently will be prevented from reaching the apertures 15 in thespinneret 11.

- Moreover, it will be seen that with the s .in-

neret and the strainer made in the form il ustrated abovethat is to say,of a general cy' lindrical form with retaining-flanges at one end of thecylinderand the perforated face inclosing the other end of thecylinder-the parts can be assembled accurately with a minimum of care.Thus the cylindrical body portion of the strainer serves to centerandposition the packing-ring 5 in position on flange 18 and to position thestrainer with respect to the seat 4. In the same manner the cylindricalbody portion of the spinneret positions the flange 13 on the seat 9 ofthe coupling 7.

The strainer and spinneret are preferably made of platinum, which is notacted upon by the substances used in the process, and they must also bevery thin, so that the small erforations therein may be drilled ofuniorm size. In View of the severe pressure to which both the strainerand the spmneret are subjected in the spinning-head by the passage ofthe viscous material therethrough the said arts must, however, be stiffand unyielding. I have found that a thin platinum spinneret Cor strainerma be made sufficlently stifl to retain its s a e when in use byproviding it with the cylin rical body portion between the perforatedportion and the 1eldge by which it Is retained in the spinningead.

While I have shown in Fig. 1 a construction in which the strainerextends in a direction toward the head 3, I have found the strainer willwithstand greater pressures when arranged in the opposite manner. Such amodified form is illustrated in Figs. 3 and 4, in which the body of boththe strainer and the spinneret extend in a direction away from the head3. The head 3 ma not be provided with an outwardly-exten ing seat in themanner shown in connection with the 5 may rest directly upon the face ofsaid head. The coupling 7 is made longer than the coupling 7, (shown inFig. 1,) and the ring 22 is disposed between the flange of the strainer16' and the gasket 21 in order to provide a sufficient s ace for thebody of the strainer between tl ie flanges of the spinneret and thestrainer.

In Figs. 5 and 6 the spinneret and strainer are arranged to extend awayfrom the head; but the body of the strainer 16 is made slightly smallerthan the spinneret 11, so as to telescope within the letter. In thismanner the rubber or gasket 18' is practically inclosed, and the viscoseis not permitted to flow over its surface. The rubber is therefore notso rapidly decomposed or deteriorated by the viscose, and the smallimpurities formed by its contact with the viscose are not permitted tobe carried to the spinneret. In other words, between the strainer andthe spinneret the viscose does not contact with anything except theplatinum, which does not act and is not acted upon by the viscose.Therefore no new clots of coagulated viscose are formed between thestrainer and the spinneret, and the flow of viscose through thespinneret will not be interrupted. This arrangement provides, then, forthe passage of the viscose through a platinum chamber between thestrainer and the spinneret, so that no new impurities are formed in theviscose after it leaves the strainer.

In other respects the operation of the modi fications shown in Figs. 3to 6 is similar to the operation of the apparatus shown in Fig. 1, theparts being also designed to he self-centering in order to, facilitatethe cleaning of the same and the substituting of strainers andspinnerets of different sizes or character istics when desired.

While I have shown several embodiments of my invention, I do not intendto limit my invention to the exact forms shown, as my invention may becarried out by any means in which the viscose is prevented from becomincoagulated between the straining means and the filament-forming means.Having thus described my invention, what- I claim, and desire to protectby Letters Patent of the United States, is-

1. In a machine for forming filaments of metamorphosed cellulose, thecombination in a spinning-head, of a platinum spinneret and a platinumstrainer, telescoping within said spinneret, said spinneret and strainerforming between them a platinum chamber to prevent the coagulation ofthe viscose between the said strainer and the point of its ejection fromthe said spinneret.

2. In a machine for forming filaments of metamorphosed cellulose, aspinneret having a cylindrical body portion, and having a flange'at oneend thereof, a strainer also hav- IIC ing a cylindrical body portion andalso having a flange at one end, the strainer telescoping withinsaidspinneret with the said flanges adjacent each other.

3. In a machine for forming filaments of metamorphosed cellulose, thecombination of a spinneret having a cylindrical body portion, and aplatinum strainer, also having a cylindrical body portion, saidspinneret and strainer having flanges at one end thereof, and a gasketinterposed between said flanges.

4. In a machine for forming filaments of metamorphosed cellulose, thecombination of a head, a coupling fitting over said head and astrainerand a spinneret both clamped between said head and said coupling.

5. In a machine for formingfilaments of metamorphosed cellulose thecombination of a head, a coupling fitting over said head, a

cup-shaped strainer and a cup-shaped spinneret both clamped between saidhead and said coupling.

' 6. In a machine for forming filaments of metamorphosed cellulose, thecombination of a head, a coupling fitting over said headand a strainerand a spinneret clamped between said head and said coupling, saidstrainer and spinneret being both cup-shaped and extending in adirection away from said head.

7. In a device for forming filaments of metamorphosed cellulose, thecombination of a head, a coupling adapted to be secured to said head,and seats on both said coupling and said head, with a flanged spinneretand a flanged strainer secured by their flanges between said seats.

the flan es of said spinneret to hol 8. In a machine for formingfilaments of metamorphosed cellulose, the combination of a head, andcouplin threaded over said head, with a perforate cup-shaped spinneretprovided with flanges and projecting through said coupling, and astrainer also cup-shaped I and provided with flanges, both the spinneretand the strainer being retained by, their flanges between said head andsaid coupling.

9. In a device for forming filaments of metamorphosed cellulose, a headprovided on its front side with a seat, a gasket in contact with saidseat, a flanged strainer having its flanges resting against said gasket,a

'said head engaging the flanges of said spinneret. In witness whereof Ihave hereunto set my hand this 26th day of January, A. D. 1906.

MONTGOMERY WADDELL.

Witnesses:

ALEXANDER PARK,- ALSTON B. MOULTON.

